mysql：插入〜重复键（多重唯一，不是pimary键）更新。不起作用

Question

 CREATE TABLE IF NOT EXISTS `table` (
     `id` int(11) NOT NULL DEFAULT '0', 
     `uniq_id` int(11) NOT NULL DEFAULT '0', 
     `uniq_cat` varchar(20) NOT NULL DEFAULT '0', 
     `value` varchar(255) NOT NULL 
    ); 

ALTER TABLE `table` 
ADD PRIMARY KEY (`id`), 
ADD UNIQUE KEY `uniq_id` (`uniq_id`,`uniq_cat`); 

INSERT INTO `table` (uniq_id, uniq_cat, value) 
VALUES ("1", "1", "ONE") 
ON DUPLICATE KEY UPDATE value = value; 

INSERT INTO `table` (uniq_id, uniq_cat, value) 
VALUES ("1", "1", "TWO") 
ON DUPLICATE KEY UPDATE value = value; 

SELECT * FROM `table` 

给出值= “ONE”
WHY ???
在第二刀片应该从“一”到“二”被覆盖，但这种情况不会发生

http://sqlfiddle.com/#!2/e443e/1

Answer 1

没有您insert into...ON DUPLICATE KEY语法问题。试试这个：

INSERT INTO `table` (uniq_id, uniq_cat, value) 
VALUES ("1", "1", "ONE") 
ON DUPLICATE KEY UPDATE value = values(value); 

INSERT INTO `table` (uniq_id, uniq_cat, value) 
VALUES ("1", "1", "TWO") 
ON DUPLICATE KEY UPDATE value = values(value); 

SQLFIDDLE DEMO